with his humble words and informal style, pope francis has become enormously popular in just a few days. what the world is just beginning to learn is how conservative he is on social issues. >> the world is probably going to have a bit of a wakeup call, when the pope starts speaking about hot button issues. >> reporter: he often clashed with kirchner over legalizing gay marriage, calling it, "the devil's handiwork." he called gay adoption "discrimination against children." and he's denounced abortion as promoting a "culture of death." but the powerful catholic strongholds of argentina and brazil are becoming more progressive. gay marriage is now legal, contraception readily available. threatening to put the popular new pope on a collision course with changing opinions in a part of the world where the church needs to grow. ron claiborne, abc news, rome. >> and we want you to know that abc news will have live coverage of the inaugural ceremony of pope francis tomorrow, about 3:50 a.m. eastern time. >>> and here at home, on the topic, some groundbreaking news in our new abc news/"washingto